a realistic simulation of the agata demonstrator + prisma spectrometer
Post on 12-Jan-2016
54 Views
Preview:
DESCRIPTION
TRANSCRIPT
A realistic simulation of the AGATA Demonstrator+PRISMA Spectrometer
Elif INCE, Istanbul University
7 th AGATA Week, 08-11 July 2008
Outline
• The Agata Demonstrator+ Prisma Spectrometer
• Aim of this work: “ Realistic” event generation of AGATA+ PRISMA coupling
• Preliminary results
• Work in Progress...
The AGATA Demonstrator Objective of the final R&D phase 2003-
2008
The AGATA Demonstrator Objective of the final R&D phase 2003-
2008
Main issue is Doppler correction capability coupling to beam and recoil
tracking devices
<1 symmetric triple-cluster>5 asymmetric triple-clusters15 36-fold segmented crystals540 segments555 digital-channels
Eff. 3 – 6 % @ M = 1
Eff. 2 – 4 % @ M = 30
Full ACQ with online PSA and
-ray tracking
MCP Position at the entrance x,y-->(,) time --> T (Start for TOF)
PRISMA SpectrometerPRISMA Spectrometer
Quadrupole focuses the ions vertically towards the dispersion plane
Dipole magnet bends ions horizontally according to their magnetic rigidity (Bρ)
MW-PPAC (Focal plane detector )position--> X,Ytime --> T (Stop for TOF)
Ionization Chamber (IC)∆E--> Energy loss E --> Total energy
• to produce realistic event generator
for multi-nucleon transfer reactions
and direct reactions.
• to evaluate the performance of the AGATA+PRISMA setup in a consistent way.
Aim of this work
How to proceed?
1. “schematic” event generation (completed!)
2. “Replay" real data into the simulation (work in progress)
3. Develop a full code to calculate cross-sections and angular distributions.
“Schematic” event generation for AGATA+
PRISMA• Realistic events were created and used as an input for AGATA+PRISMA simulation according to results from a performed CLARA-PRISMA experiment.
• 90Zr + 208Pb (0.300mg/cm², @ 45.0°)
• projectile energy:560 MeV
• Projectile-like energy:346.2 MeV(average energy)
(29% FWHM dispersion)
• 1 -ray (1000keV) from each ion in order to see Doppler correction effects of AGATA Demonstrator.
Simulation of the Agata Demonstrator+Prisma
Coupling1. Conditions set:• Demonstrator Geometry (5 triple clusters)• Demonstrator distance: 14 cm to target. • Number of Events: 100.000
2.Mgt (Mars Gamma Tracking): used for producing
tracked gammas. (D.BAZZACCO)
3.CMerge (Clara+Agata Merge): used for combining
“Agata+Prisma” into a single data file.(E.FARNEA)
Effect of the recoil velocity
Doppler correction capabilities
• Assuming that 3 projectile-like ions were obtained from the reaction emitting photons with very close energies;
90Zr (1000 keV) 91Zr (1003 keV) 89Y (998 keV)
• 90Zr + 208Pb (0.300mg/cm², @ 45.0°) • projectile energy:560 MeV• projectile like energies:(29% FWHM
dispersion)
90Zr--> 346.2 MeV 91Zr--> 344.7 MeV 89Y--> 343.8 MeV
“Schematic” event generation for more complicated step using 3 projectile-like
Projections of Ions
• Assuming that 4 projectile-like ions were obtained from the reaction emitting photons with very close energies;
90Zr (1000 keV) 91Zr (1003 keV) 89Y (998 keV)
90Y (999 keV)
• 90Zr + 208Pb (0.300mg/cm², @ 45.0°) • projectile energy:560 MeV• Projectile-like energies:(29% FWHM dispersion)
90Zr--> 346.2 MeV 91Zr--> 344.7 MeV 89Y--> 343.8 MeV 90Y--> 341.8 MeV
“Schematic” event generation for more complicated step using 4 projectile-like
Projections of Ions
Work in Progress..
• The idea is to obtain a realistic ion distribution by "replaying" real data into simulation.
• 48Ca+238U(@310MeV) reaction was considered.
(CLARA-PRISMA experiment, Daniele Mengoni, Jose Javier Valiente-Dobon)
• Mass spectra were produced of PRISMA standalone-simulation.
Produced masses from Simulated Data
Comparison of “Ca” ion’s for Simulated&Real data
top related